Masturbation

Asked for Male, 21 Years

After masturbation I feel lethargic(that's natural) but also I get an empty void at my back and within 24 hours my back pains.I am just 21 and I don't have any back problem yet but particularly after masturbation I get a pain.Also after masturbation for sometime I feel blurred in eyesight.What are the causes of such issues??